64612613 has 8 divisors (see below), whose sum is σ = 69648600. Its totient is φ = 59586048.

The previous prime is 64612601. The next prime is 64612657. The reversal of 64612613 is 31621646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30891364 + 33721249 = 5558^2 + 5807^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64612613 - 2⁶ = 64612549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64612663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19373 + ... + 22461.

It is an arithmetic number, because the mean of its divisors is an integer number (8706075).

Almost surely, 2^64612613 is an apocalyptic number.

It is an amenable number.

64612613 is a deficient number, since it is larger than the sum of its proper divisors (5035987).

64612613 is a wasteful number, since it uses less digits than its factorization.

64612613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711.

The product of its digits is 5184, while the sum is 29.

The square root of 64612613 is about 8038.1971237337. The cubic root of 64612613 is about 401.2722263934.

The spelling of 64612613 in words is "sixty-four million, six hundred twelve thousand, six hundred thirteen".